*,
*:before,
*:after {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
}

body {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.clearfix {
    zoom: 1;
}
.clearfix:before, .clearfix:after {
    content: "\0020";
    display: block;
    height: 0;
    overflow: hidden;
}
.clearfix:after {
    clear: both;
}

body {
    background: white;
}

ul {
    position: relative;
    -webkit-transform: rotate(-35deg) skew(20deg, 5deg);
    transform: rotate(-35deg) skew(20deg, 5deg);
}

.list-item {
    background: #000;
    color: #575757;
    text-align: center;
    height: 2.5em;
    width: 4em;
    vertical-align: middle;
    line-height: 2.5em;
    border-bottom: 1px solid #060606;
    position: relative;
    display: block;
    text-decoration: none;
    box-shadow: -2em 1.5em 0 #e1e1e1;
    -webkit-transition: all .25s linear;
    transition: all .25s linear;
}
.list-item:hover {
    background: #b65234;
    color: black;
    -webkit-transform: translate(0.9em, -0.9em);
    transform: translate(0.9em, -0.9em);
    -webkit-transition: all .25s linear;
    transition: all .25s linear;
    box-shadow: -2em 2em 0 #e1e1e1;
}
.list-item:hover:before, .list-item:hover:after {
    -webkit-transition: all .25s linear;
    transition: all .25s linear;
}
.list-item:hover:before {
    background: #b65234;
    width: 1em;
    top: .5em;
    left: -1em;
}
.list-item:hover:after {
    background: #b65234;
    width: 1em;
    bottom: -2.5em;
    left: 1em;
    height: 4em;
}
.list-item:before, .list-item:after {
    content: '';
    position: absolute;
    -webkit-transition: all .25s linear;
    transition: all .25s linear;
    width: .5em;
}
.list-item:after {
    height: 4em;
    background: #181818;
    bottom: -2.25em;
    left: 1.5em;
    -webkit-transform: rotate(90deg) skew(0, 45deg);
    transform: rotate(90deg) skew(0, 45deg);
}
.list-item:before {
    height: 2.5em;
    top: .25em;
    left: -.5em;
    -webkit-transform: skewY(-45deg);
    transform: skewY(-45deg);
}
